html, body {
    margin: 0;
    padding: 0;
    height: 100%; /* 关键：确保高度占满屏幕 */
  }
  
  html {
    background: linear-gradient(to bottom right, #af441a, #dcaf30);
    background-attachment: fixed; /* 防止滚动时重复 */
    background-repeat: no-repeat; /* 禁止重复 */
    background-size: cover; /* 拉伸覆盖全屏 */
  }

.navbar_ul {
    z-index: 1000;
    position: fixed;
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
    position: fixed;
    top: 0;
    width: 100%;
}

.navbar_li {
    float: left;
}

.navbar_li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

.navbar_li a:hover:not(.active) {
    background-color: #111;
}

.active {
    background-color: #fd8700;
}

.footer {
    position:static;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    transform: scale(1.2);
    font-size: 0.8em;
}

.white_text {
    color: #f0f0f0;
}

textarea {
    background-color: rgba(255, 255, 255, 0.05);
    border: 2px solid #ffffff;
}

textarea:focus {
    background-color: rgba(255, 255, 255, 0.1);
}

textarea::placeholder {
    font-size: 50%;
    color: #f0f0f0;
}

.white_text textarea {
    color:white
}

.text-button {
    /* 核心样式：无边框无填充 */
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    
    /* 文字样式 */
    color: #ffffff;
    font-size: 1.1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    position: relative;
    border-radius: 5px;
    padding: 8px 16px; /* 增加内边距使按钮更易点击 */

    /* 过渡效果 */
    transition: all 0.3s ease;

    font-size: larger;
}

/* 悬停效果 - 基础 */
.text-button:hover {
    color: #efefef;
}